1 files changed, 328 insertions, 0 deletions
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
new file mode 100644
index 0000000000..e23403b0d0
--- /dev/null
+++ b/lib/VMCore/AsmWriter.cpp
@@ -0,0 +1,328 @@
+//===-- Writer.cpp - Library for Printing VM assembly files ------*- C++ -*--=//
+//
+// This library implements the functionality defined in llvm/Assembly/Writer.h
+//
+// This library uses the Analysis library to figure out offsets for
+// variables in the method tables...
+//
+// TODO: print out the type name instead of the full type if a particular type
+//       is in the symbol table...
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Analysis/SlotCalculator.h"
+#include "llvm/Module.h"
+#include "llvm/Method.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/ConstPoolVals.h"
+#include "llvm/iOther.h"
+#include "llvm/iMemory.h"
+
+class AssemblyWriter : public ModuleAnalyzer {
+  ostream &Out;
+  SlotCalculator &Table;
+public:
+  inline AssemblyWriter(ostream &o, SlotCalculator &Tab) : Out(o), Table(Tab) {
+  }
+
+  inline void write(const Module *M)         { processModule(M);      }
+  inline void write(const Method *M)         { processMethod(M);      }
+  inline void write(const BasicBlock *BB)    { processBasicBlock(BB); }
+  inline void write(const Instruction *I)    { processInstruction(I); }
+  inline void write(const ConstPoolVal *CPV) { processConstant(CPV);  }
+
+protected:
+  virtual bool visitMethod(const Method *M);
+  virtual bool processConstPool(const ConstantPool &CP, bool isMethod);
+  virtual bool processConstant(const ConstPoolVal *CPV);
+  virtual bool processMethod(const Method *M);
+  virtual bool processMethodArgument(const MethodArgument *MA);
+  virtual bool processBasicBlock(const BasicBlock *BB);
+  virtual bool processInstruction(const Instruction *I);
+
+private :
+  void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
+};
+
+
+
+// visitMethod - This member is called after the above two steps, visting each
+// method, because they are effectively values that go into the constant pool.
+//
+bool AssemblyWriter::visitMethod(const Method *M) {
+  return false;
+}
+
+bool AssemblyWriter::processConstPool(const ConstantPool &CP, bool isMethod) {
+  // Done printing arguments...
+  if (isMethod) Out << ")\n";
+
+  ModuleAnalyzer::processConstPool(CP, isMethod);
+  
+  if (isMethod)
+    Out << "begin";
+  else
+    Out << "implementation\n";
+  return false;
+}
+
+
+// processConstant - Print out a constant pool entry...
+//
+bool AssemblyWriter::processConstant(const ConstPoolVal *CPV) {
+  Out << "\t";
+
+  // Print out name if it exists...
+  if (CPV->hasName())
+    Out << "%" << CPV->getName() << " = ";
+
+  // Print out the opcode...
+  Out << CPV->getType();
+
+  // Write the value out now...
+  writeOperand(CPV, false, false);
+
+  if (!CPV->hasName() && CPV->getType() != Type::VoidTy) {
+    int Slot = Table.getValSlot(CPV); // Print out the def slot taken...
+    Out << "\t\t; <" << CPV->getType() << ">:";
+    if (Slot >= 0) Out << Slot;
+    else Out << "<badref>";
+  } 
+
+  Out << endl;
+  return false;
+}
+
+// processMethod - Process all aspects of a method.
+//
+bool AssemblyWriter::processMethod(const Method *M) {
+  // Print out the return type and name...
+  Out << "\n" << M->getReturnType() << " \"" << M->getName() << "\"(";
+  Table.incorporateMethod(M);
+  ModuleAnalyzer::processMethod(M);
+  Table.purgeMethod();
+  Out << "end\n";
+  return false;
+}
+
+// processMethodArgument - This member is called for every argument that 
+// is passed into the method.  Simply print it out
+//
+bool AssemblyWriter::processMethodArgument(const MethodArgument *Arg) {
+  // Insert commas as we go... the first arg doesn't get a comma
+  if (Arg != Arg->getParent()->getArgumentList().front()) Out << ", ";
+
+  // Output type...
+  Out << Arg->getType();
+  
+  // Output name, if available...
+  if (Arg->hasName())
+    Out << " %" << Arg->getName();
+  else if (Table.getValSlot(Arg) < 0)
+    Out << "<badref>";
+  
+  return false;
+}
+
+// processBasicBlock - This member is called for each basic block in a methd.
+//
+bool AssemblyWriter::processBasicBlock(const BasicBlock *BB) {
+  if (BB->hasName()) {              // Print out the label if it exists...
+    Out << "\n" << BB->getName() << ":\n";
+  } else {
+    int Slot = Table.getValSlot(BB);
+    Out << "\t\t\t\t; <label>:";
+    if (Slot >= 0) 
+      Out << Slot << endl;         // Extra newline seperates out label's
+    else 
+      Out << "<badref>\n"; 
+  }
+
+  ModuleAnalyzer::processBasicBlock(BB);
+  return false;
+}
+
+// processInstruction - This member is called for each Instruction in a methd.
+//
+bool AssemblyWriter::processInstruction(const Instruction *I) {
+  Out << "\t";
+
+  // Print out name if it exists...
+  if (I && I->hasName())
+    Out << "%" << I->getName() << " = ";
+
+  // Print out the opcode...
+  Out << I->getOpcode();
+
+  // Print out the type of the operands...
+  const Value *Operand = I->getOperand(0);
+
+  // Special case conditional branches to swizzle the condition out to the front
+  if (I->getInstType() == Instruction::Br && I->getOperand(1)) {
+    writeOperand(I->getOperand(2), true);
+    Out << ",";
+    writeOperand(Operand, true);
+    Out << ",";
+    writeOperand(I->getOperand(1), true);
+
+  } else if (I->getInstType() == Instruction::Switch) {
+    // Special case switch statement to get formatting nice and correct...
+    writeOperand(Operand         , true); Out << ",";
+    writeOperand(I->getOperand(1), true); Out << " [";
+
+    for (unsigned op = 2; (Operand = I->getOperand(op)); op += 2) {
+      Out << "\n\t\t";
+      writeOperand(Operand, true); Out << ",";
+      writeOperand(I->getOperand(op+1), true);
+    }
+    Out << "\n\t]";
+
+  } else if (I->getInstType() == Instruction::Ret && !Operand) {
+    Out << " void";
+  } else if (I->getInstType() == Instruction::Call) {
+    writeOperand(Operand, true);
+    Out << "(";
+    Operand = I->getOperand(1);
+    if (Operand) writeOperand(Operand, true);
+    for (unsigned op = 2; (Operand = I->getOperand(op)); ++op) {
+      Out << ",";
+      writeOperand(Operand, true);
+    }
+
+    Out << " )";
+  } else if (I->getInstType() == Instruction::Malloc || 
+	     I->getInstType() == Instruction::Alloca) {
+    Out << " " << ((const PointerType*)((ConstPoolType*)Operand)
+		   ->getValue())->getValueType();
+    if ((Operand = I->getOperand(1))) {
+      Out << ","; writeOperand(Operand, true);
+    }
+
+  } else if (Operand) {   // Print the normal way...
+
+    // PrintAllTypes - Instructions who have operands of all the same type 
+    // omit the type from all but the first operand.  If the instruction has
+    // different type operands (for example br), then they are all printed.
+    bool PrintAllTypes = false;
+    const Type *TheType = Operand->getType();
+    unsigned i;
+
+    for (i = 1; (Operand = I->getOperand(i)); i++) {
+      if (Operand->getType() != TheType) {
+	PrintAllTypes = true;       // We have differing types!  Print them all!
+	break;
+      }
+    }
+
+    if (!PrintAllTypes)
+      Out << " " << I->getOperand(0)->getType();
+
+    for (unsigned i = 0; (Operand = I->getOperand(i)); i++) {
+      if (i) Out << ",";
+      writeOperand(Operand, PrintAllTypes);
+    }
+  }
+
+  // Print a little comment after the instruction indicating which slot it
+  // occupies.
+  //
+  if (!I->hasName() && I->getType() != Type::VoidTy) {
+    int Slot = Table.getValSlot(I); // Print out the def slot taken...
+    Out << "\t\t; <" << I->getType() << ">:";
+    if (Slot >= 0) Out << Slot;
+    else Out << "<badref>";
+
+    Out << "\t[#uses=" << I->use_size() << "]";  // Output # uses
+  }
+
+  Out << endl;
+
+  return false;
+}
+
+
+void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType, 
+				  bool PrintName) {
+  if (PrintType)
+    Out << " " << Operand->getType();
+  
+  if (Operand->hasName() && PrintName) {
+    Out << " %" << Operand->getName();
+  } else {
+    int Slot = Table.getValSlot(Operand);
+    
+    if (Operand->getValueType() == Value::ConstantVal) {
+      Out << " " << ((ConstPoolVal*)Operand)->getStrValue();
+    } else {
+      if (Slot >= 0)  Out << " %" << Slot;
+      else if (PrintName)
+        Out << "<badref>";     // Not embeded into a location?
+    }
+  }
+}
+
+
+//===----------------------------------------------------------------------===//
+//                       External Interface declarations
+//===----------------------------------------------------------------------===//
+
+
+
+void WriteToAssembly(const Module *M, ostream &o) {
+  if (M == 0) { o << "<null> module\n"; return; }
+  SlotCalculator SlotTable(M, true);
+  AssemblyWriter W(o, SlotTable);
+
+  W.write(M);
+}
+
+void WriteToAssembly(const Method *M, ostream &o) {
+  if (M == 0) { o << "<null> method\n"; return; }
+  SlotCalculator SlotTable(M->getParent(), true);
+  AssemblyWriter W(o, SlotTable);
+
+  W.write(M);
+}
+
+
+void WriteToAssembly(const BasicBlock *BB, ostream &o) {
+  if (BB == 0) { o << "<null> basic block\n"; return; }
+
+  SlotCalculator SlotTable(BB->getParent(), true);
+  AssemblyWriter W(o, SlotTable);
+
+  W.write(BB);
+}
+
+void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) {
+  if (CPV == 0) { o << "<null> constant pool value\n"; return; }
+
+  SlotCalculator *SlotTable;
+
+  // A Constant pool value may have a parent that is either a method or a 
+  // module.  Untangle this now...
+  //
+  if (CPV->getParent() == 0 || 
+      CPV->getParent()->getValueType() == Value::MethodVal) {
+    SlotTable = new SlotCalculator((Method*)CPV->getParent(), true);
+  } else {
+    assert(CPV->getParent()->getValueType() == Value::ModuleVal);
+    SlotTable = new SlotCalculator((Module*)CPV->getParent(), true);
+  }
+
+  AssemblyWriter W(o, *SlotTable);
+  W.write(CPV);
+
+  delete SlotTable;
+}
+
+void WriteToAssembly(const Instruction *I, ostream &o) {
+  if (I == 0) { o << "<null> instruction\n"; return; }
+
+  SlotCalculator SlotTable(I->getParent() ? I->getParent()->getParent() : 0, 
+			   true);
+  AssemblyWriter W(o, SlotTable);
+
+  W.write(I);
+}